<!DOCTYPE html>
<html lang="zh-CN">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>时间线记录内存变化</title>
  </head>
  <body>
    <button id="btn">add</button>
    <script>
      const btnEl = document.getElementById('btn');
      const arrList = [];

      function test() {
        for (let i = 0; i < 10000; i++) {
          document.body.appendChild(document.createElement('p'));
          arrList.push(new Array(1000000).join('x'));
        }
      }

      btnEl.addEventListener('click', test);
    </script>
  </body>
</html>
